Your just multiplying 7 and 10, so your answer is gonna be B.
Answer:
12.5% of students
Step-by-step explanation:
To find this you would divide 4 by 32 (4/32) and get 0.125. To find a percent, you multiply by 100 and get 12.5%
Answer:
7.8
Step-by-step explanation:
Answer:
-y^2 - 10 y - x^72 + -1
Step-by-step explanation:
Simplify the following:
-y^2 - 3 y - 5 - (x^36)^2 - 7 y + 4
Multiply exponents. (x^36)^2 = x^(36×2):
-y^2 - 3 y - 5 - x^(36×2) - 7 y + 4
36×2 = 72:
-y^2 - 3 y - 5 - x^72 - 7 y + 4
Grouping like terms, -y^2 - 3 y - 5 - x^72 - 7 y + 4 = -y^2 + (-3 y - 7 y) - x^72 + (4 - 5):
-y^2 + (-3 y - 7 y) - x^72 + (4 - 5)
-3 y - 7 y = -10 y:
-y^2 + -10 y - x^72 + (4 - 5)
4 - 5 = -1:
Answer: -y^2 - 10 y - x^72 + -1
Answer: Josie has 25 nickels and 9 quarters.
Step-by-step explanation:
Let x = Number of Nickels , y =Number of Quarters.
Then x+y = 34
⇒ y=34-x (i)
$3.50 = 350 cents [ $1 = 100 cents ]
Then, 5x+25y= 350 (ii) [Since 1 nickel = 5 cents , 1 quarter = 25 cents]
Substitute value of y from (i)
5x+25 (34-x)=350
⇒ 5x + 850 - 25x =350
⇒ -20x= 350-850
⇒ -20x= -500
⇒ x = 25 [divide both sides by -20]
Put this in (i) , we get y= 34-25=9
Therefore, Josie has 25 nickels and 9 quarters.
